Chapter 2 Alarm Troubleshooting

2.7.159 LPKTERMINAL (CE100T)

Caution CTC permits loopbacks to be performed on an in-service (IS) circuit. Loopbacks are Service-Affecting (SA).

Note Before performing a facility (line) loopback on an OC-3 or OC-12 port, ensure the card contains at least two DCC paths to the node where the card is installed. A second DCC path provides a nonlooped path to log into the node after the loopback is applied, thus enabling you to remove the facility loopback.

Ensuring a second DCC is not necessary if you are directly connected to the ONS 15310-CL or ONS 15310-MA containing the loopback OC-3 or OC-12.

Clear the LPBKFACILITY (OCN) Condition

Step 1 Complete the “Clear an OC-N Port Facility or Terminal Loopback Circuit” procedure on page 2-156.

Step 2 If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.159 LPKTERMINAL (CE100T)

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

SONET Logical Object: CE100T

A Loopback Terminal condition on a CE-100T-8 port occurs when a software terminal loopback is active for a port on the card.

For information about troubleshooting optical circuits with loopbacks, refer to the “1.1 Network Troubleshooting Tests” section on page 1-2.

Clear the LPBKTERMINAL (CE100T) Condition

Step 1 Complete the “Clear an Ethernet Card Loopback Circuit” procedure on page 2-157.

Step 2 If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.160 LPBKTERMINAL (DS1, DS3)

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

SONET Logical Objects: DS1, DS3

ALoopback Terminal condition for a DS-1 or DS-3 signal occurs when a software terminal (inward) loopback is active for a DS1 or DS3 port on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card. DS-1 and DS-3 terminal loopbacks do not typically return an AIS signal.

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0

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ONS 15310-CL, ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

The Cisco ONS 15310-MA is an advanced multi-service platform designed for metropolitan area networks. It facilitates the seamless transport of data, voice, and video over optical networks. One of its main features is its ability to support a variety of interfaces, including Ethernet, SONET/SDH, and Wavelength Division Multiplexing (WDM), allowing users to integrate multiple services into a single platform. Additionally, the ONS 15310-MA supports advanced traffic management and Quality of Service (QoS) features to prioritize critical applications and ensure consistent performance.

The ONS 15310-CL variant is tailored for more specific applications, providing enhanced capabilities aimed at delivering carrier-grade services. It features a robust architecture that accommodates high-capacity traffic without compromising reliability. This model emphasizes low power consumption and a compact design, making it suitable for deployment in space-constrained environments. The ONS 15310-CL also supports a wide range of optical interfaces, making it highly flexible for various network configurations.

In terms of technologies, the Cisco ONS 15310 series leverages Optical Transport Network (OTN) capabilities, providing high efficiency and greater bandwidth utilization. OTN technology enables efficient error correction and adds resilience to the network through its built-in protection mechanisms. Furthermore, the series supports seamless integration with existing IP/MPLS networks, creating a cohesive infrastructure as organizations evolve their networking requirements.

One of the defining characteristics of the ONS 15310 series is its focus on scalability. Network operators can start with a modest deployment and gradually expand capacity as demand grows. This adaptability is complemented by Cisco's comprehensive management and monitoring tools, providing operators with real-time insights into network performance and facilitating proactive management.

In conclusion, the Cisco ONS 15310-MA and ONS 15310-CL models represent sophisticated solutions for modern optical networks. With their versatile features, advanced technologies, and robust design, they empower service providers and enterprises to build resilient, high-capacity networks that meet the demands of today’s data-driven world.
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